基于缨帽变换和热红外数据的地表温度反演

选取覆盖柳州市的Landsat 5 TM数字影像,利用缨帽变换提取研究区的植被指数,应用辐射传输方程法反演研究区的地表温度;并与传统的热红外卫星遥感技术反演的结果进行比较,分析研究区2001~2011年10年间地表温度的变化。结果表明:比较改进方法和传统方法反演结果的标准差,改进方法的标准差略低,证明了改进方法的可行性和有效性。柳州地区11月份的温度主要集中在15~25℃;10年中,该温区间范围减少,有部分区域逐步向高温区转化,表明柳州地区的城市地表亮温有升高的趋势;柳州地区的高温区主要集中在中心城区,主要是由密集的建筑群和工业、居民日常生活等产生的人为热造成的。

Retrieval of Land Surface Temperature Based onThermal Infrared Data and Tasseled Cap Transformation

Based on Landsat 5 TM digital images coverage in Liuzhou City, the vegetation index in the area is extracted using tasseled cap transformation, and the surface temperature is obtained in the area using the method of radiation transfer equation .Comparing the retrieval of land surface temperature with the traditional thermal infrared satellite , the change of the surface temperature of the study area during 2001-2011 year is studied. The results show that :Comparing the standard deviation of improved method with the traditional method , standard deviation of the improved method is slightly lower, it proves the feasibility and effectiveness of the improved method; The temperature of Liuzhou in November is mainly in the 15 ~ C - 25 ~ C, the temperature range is gradually reduced during 10 years, part of the regional transfers to the high temperature zone, it shows that , the surface temperature of Liuzhou City is increasing; High temperature areas in Liuzhou are mainly concentrated in the center of city , the main reason is the man-made heat caused by intensive construction and industrial, residents of the daily life.